title: Path length modulation technique for scatter noise immunity in squeezing measurements.
abstract: We present a technique for frequency shifting scattering induced noise on squeezed light beams, providing immunity from scattered light while preserving the squeezed states. Using a 500 Hz pre and postsqueezing apparatus path length modulation, we show up to a 20 dB reduction in scattering induced noise while recovering squeezing measurement below the shot noise level. Such a technique offers immunity to spurious scattering sources without the need for optically lossy isolation optics.
authors.affiliation: Department of Quantum Science, Australian National University, Acton, Canberra, ACT 0200, Australia. andrew.wade@anu.edu.au
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Wade
authors.forename: Sheon S Y
authors.initials: SS
authors.lastname: Chua
authors.forename: Michael S
authors.initials: MS
authors.lastname: Stefszky
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Shaddock
authors.forename: David E
authors.initials: DE
authors.lastname: McClelland